Épisodes

  • How heavy are the clouds?

    How heavy are the clouds?
    Apr 22 2021
    The clouds we see in the sky seem rather light, almost like absorbent cotton. However, being filled with water and ice, these gigantic suspended masses weigh - in reality - up to several tons. Don't be fooled by appearances, the clouds that float above your heads are more like anvils in suspension. Indeed, being made of billions of water and ice droplets, these vaporous masses can weigh far more than you may expect. With a water density of about 0.5 grams per cubed meter, a cloud of 100 kilometers cubed can reach the mass of 500 000 tons. See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit megaphone.fm/adchoices
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    3 min
  • What is the Rowbotham experiment?

    What is the Rowbotham experiment?
    Apr 21 2021
    Long before Magellan completed the first circumnavigation of the globe, in the 16th century, ancient Greek scientists had demonstrated, by simple observation, that the Earth was round, or rather spherical. Of course, this did not prevent some people from believing that our planet was flat. To be fair, even some individuals don’t believe it now.  See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit megaphone.fm/adchoices
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    3 min
  • Why is biting foil unpleasant?

    Why is biting foil unpleasant?
    Apr 20 2021
    As you may have already noticed, if you bite aluminum foil, the strange sensation of heat or pain in your teeth is quite unpleasant. This is due to the contact between the aluminum and the metals that make up the fillings in some teeth. If you feel a tingling sensation when biting aluminum foil, it is because some of your teeth have been provided with fillings. In this case, the connection between the aluminum and the elements of the filling causes a reaction similar to that of a battery.  See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit megaphone.fm/adchoices
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    3 min
  • Why are Bermuda shorts a military garment?

    Why are Bermuda shorts a military garment?
    Apr 19 2021
    You all know the Bermuda shorts: those shorts that come down to the knee, unlike the classic shorts that only cover part of the thighs. You may be more familiar with the name “dad shorts.” While today it is considered as a vacation or a summer outfit for older generations, its origin is quite different. See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit megaphone.fm/adchoices
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    2 min
  • Why do many Vietnamese have "Nguyen" in their name?

    Why do many Vietnamese have "Nguyen" in their name?
    Apr 18 2021
    According to some estimates, the surname "Nguyen" is used by around 40% of the population in Vietnam. This country is home to 95 million people, so there are nearly 38 million Mr. or Mrs. Nguyen. This makes Nguyen the 4th most popular name in the world, just behind Lee, Zhang and Wang, all Chinese names. See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit megaphone.fm/adchoices
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    2 min
  • What are the 10 most surprising objects launched into space?

    What are the 10 most surprising objects launched into space?
    Apr 15 2021
    Mankind doesn't just send rockets or space probes into space. In fact, many unexpected objects have been launched into space, all for the sake of science.  See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit megaphone.fm/adchoices
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    3 min
  • Why are ancient Egyptian depictions of humans drawn in profile?

    Why are ancient Egyptian depictions of humans drawn in profile?
    Apr 14 2021
    On the walls of the Egyptian pyramids, human depictions, and especially depictions of nobility, are often represented in profile. The reason they are designed this way is primarily religious. If you look closely, you’ll notice that the ancient Egyptian characters are not entirely represented in profile. Only the face, the legs and the arms are painted in this way. The bust and torse is represented from the front. And actually the singular eye on the profile face is depicted as if being viewed from the front, rather asynchronous to the rest of the face.  See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit megaphone.fm/adchoices
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    3 min
  • Why does spaghetti never break in half?

    Why does spaghetti never break in half?
    Apr 13 2021
    Have you noticed this before? Try this little experiment: Try to break a raw spaghetti noodle in half with your fingers by bending it until it breaks. If you give it a go, the noodle will most likely break, but not into two pieces. There's no need to feel sorry for yourself if you failed – your skills are not at fault. Raw spaghetti breaks into 3, 4, 5 or more pieces, but almost never in two. In fact, it is almost impossible to do so. This is the "mystery of the broken spaghetti". It may seem trivial, but it has interested many great scientists, including Richard Feynman, the famous American physicist of the 20th century. He was primarily known for reformulating quantum mechanics. See acast.com/privacy for privacy and opt-out information. Learn more about your ad choices. Visit megaphone.fm/adchoices
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    3 min